<!DOCTYPE HTML>
<html>

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <title>运营系统登录页</title>
  <!-- <base href="./"> -->
  <link href="static/css/login.css" rel="stylesheet" type="text/css">
  <script type="text/javascript" src="static/lib/jquery/1.9.1/jquery.min.js"></script>
  <!-- <script src="static/js/verificationNumbers.js" tppabs="static/js/verificationNumbers.js"></script> -->
  <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
  <style>
    .J_codeimg {
      /* z-index: -1;
      position: absolute; */
    }
  </style>
  <script>
    $(document).ready(function () {
      //验证码
      createCode();
    });
    // 刷新方法
    function createCode() {
      // 发送请求
      this.axios.get("http://127.0.0.1:3000/captcha").then((res) => {
        console.log(res)
        let svg = res.data.img
        let str = res.data.str
        svg = `<div>${svg}</div>`
        myCanvas.innerHTML = svg
      })
    }
    function login() {
      let account=document.getElementsByClassName('login_txtbx')[0].value
      let password=document.getElementsByClassName('login_txtbx')[1].value
      let code=document.getElementsByClassName('login_txtbx')[2].value
      this.axios.post("http://127.0.0.1:3000/login",{
        userName:account,
        password:password,
        captcha:code
      }).then(res => {
        console.log(res);
      })
    }
  </script>
</head>

<body>
  <div class="login-box" id="demo">
    <div class="input-content">
      <div class="login_tit">
        <div>
          <i class="tit-bg left"></i>
          Everyday · 运营系统
          <i class="tit-bg right"></i>
        </div>
        <p>Strive&nbsp;&nbsp;&nbsp;&nbsp;Everyday</p>
      </div>
      <p class="p user_icon">
        <input type="text" placeholder="账号" autocomplete="off" class="login_txtbx">
      </p>
      <p class="p pwd_icon">
        <input type="text" placeholder="密码" autocomplete="off" class="login_txtbx">
      </p>
      <div class="p val_icon">
        <div class="checkcode">
          <input type="text" id="J_codetext" placeholder="验证码" autocomplete="off" maxlength="4" class="login_txtbx">
          <div class="J_codeimg" id="myCanvas" onclick="createCode()"></div>
        </div>
        <!-- <a class="ver_btn" onclick="createCode();" onselectstart="return false">看不清，换一张</a> -->
      </div>
      <div class="signup">
        <!-- <a class="gv" href="#" onclick="validate()">登&nbsp;&nbsp;录</a> -->
        <a class="gv" href="#" onclick="login()">登&nbsp;&nbsp;录</a>
        <a class="gv" href="#">清&nbsp;&nbsp;空</a>
      </div>
    </div>
    <div class="canvaszz"> </div>
    <canvas id="canvas"></canvas>
  </div>
  <script>
    //宇宙特效
    "use strict";
    var canvas = document.getElementById('canvas'),
      ctx = canvas.getContext('2d'),
      w = canvas.width = window.innerWidth,
      h = canvas.height = window.innerHeight,

      hue = 217,
      stars = [],
      count = 0,
      maxStars = 2500;//星星数量

    var canvas2 = document.createElement('canvas'),
      ctx2 = canvas2.getContext('2d');
    canvas2.width = 100;
    canvas2.height = 100;
    var half = canvas2.width / 2,
      gradient2 = ctx2.createRadialGradient(half, half, 0, half, half, half);
    gradient2.addColorStop(0.025, '#CCC');
    gradient2.addColorStop(0.1, 'hsl(' + hue + ', 61%, 33%)');
    gradient2.addColorStop(0.25, 'hsl(' + hue + ', 64%, 6%)');
    gradient2.addColorStop(1, 'transparent');

    ctx2.fillStyle = gradient2;
    ctx2.beginPath();
    ctx2.arc(half, half, half, 0, Math.PI * 2);
    ctx2.fill();

    // End cache

    function random(min, max) {
      if (arguments.length < 2) {
        max = min;
        min = 0;
      }

      if (min > max) {
        var hold = max;
        max = min;
        min = hold;
      }

      return Math.floor(Math.random() * (max - min + 1)) + min;
    }

    function maxOrbit(x, y) {
      var max = Math.max(x, y),
        diameter = Math.round(Math.sqrt(max * max + max * max));
      return diameter / 2;
      //星星移动范围，值越大范围越小，
    }

    var Star = function () {

      this.orbitRadius = random(maxOrbit(w, h));
      this.radius = random(60, this.orbitRadius) / 18;
      //星星大小
      this.orbitX = w / 2;
      this.orbitY = h / 2;
      this.timePassed = random(0, maxStars);
      this.speed = random(this.orbitRadius) / 500000;
      //星星移动速度
      this.alpha = random(2, 10) / 10;

      count++;
      stars[count] = this;
    }

    Star.prototype.draw = function () {
      var x = Math.sin(this.timePassed) * this.orbitRadius + this.orbitX,
        y = Math.cos(this.timePassed) * this.orbitRadius + this.orbitY,
        twinkle = random(10);

      if (twinkle === 1 && this.alpha > 0) {
        this.alpha -= 0.05;
      } else if (twinkle === 2 && this.alpha < 1) {
        this.alpha += 0.05;
      }

      ctx.globalAlpha = this.alpha;
      ctx.drawImage(canvas2, x - this.radius / 2, y - this.radius / 2, this.radius, this.radius);
      this.timePassed += this.speed;
    }

    for (var i = 0; i < maxStars; i++) {
      new Star();
    }

    function animation() {
      ctx.globalCompositeOperation = 'source-over';
      ctx.globalAlpha = 0.5; //尾巴
      ctx.fillStyle = 'hsla(' + hue + ', 64%, 6%, 2)';
      ctx.fillRect(0, 0, w, h)

      ctx.globalCompositeOperation = 'lighter';
      for (var i = 1, l = stars.length; i < l; i++) {
        stars[i].draw();
      };

      window.requestAnimationFrame(animation);
    }

    animation();
  </script>

</body>

</html>